Got a rectangular glass light fitting from B&Q.
It involved screwing a bracket to the ceiling and then attaching the light to this with 2 screws. Unfortuately rather than making the thing properly the bracket that went on the ceiling rather than fitting anything like square was about 10 degrees off.
I got it almost straight, oh hum.
I've fitted a few like this - it seems to be a deliberate design. It does slightly increase the chance of being able to get at least one screw into a joist, so I don't know if that's the reasoning.
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